[NET]: Multiple namespaces in the all dst_ifdown routines.

Move dst entries to a namespace loopback to catch refcounting leaks.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 15 insertions, 9 deletions

diff --git a/net/core/dst.c b/net/core/dst.c
index f538061f4b93..5c6cfc4e7fdb 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -279,11 +279,11 @@ static inline void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
         if (!unregister) {
                 dst->input = dst->output = dst_discard;
         } else {
-                dst->dev = init_net.loopback_dev;
+                dst->dev = dst->dev->nd_net->loopback_dev;
                 dev_hold(dst->dev);
                 dev_put(dev);
                 if (dst->neighbour && dst->neighbour->dev == dev) {
-                        dst->neighbour->dev = init_net.loopback_dev;
+                        dst->neighbour->dev = dst->dev;
                         dev_put(dev);
                         dev_hold(dst->neighbour->dev);
                 }
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index d95e48e8d65c..b576f8cd4019 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1512,8 +1512,9 @@ static void ipv4_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 {
         struct rtable *rt = (struct rtable *) dst;
         struct in_device *idev = rt->idev;
-        if (dev != init_net.loopback_dev && idev && idev->dev == dev) {
-                struct in_device *loopback_idev = in_dev_get(init_net.loopback_dev);
+        if (dev != dev->nd_net->loopback_dev && idev && idev->dev == dev) {
+                struct in_device *loopback_idev =
+                        in_dev_get(dev->nd_net->loopback_dev);
                 if (loopback_idev) {
                         rt->idev = loopback_idev;
                         in_dev_put(idev);
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index b4948c170b3e..10b72d185bb9 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -214,7 +214,8 @@ static void xfrm4_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 
         xdst = (struct xfrm_dst *)dst;
         if (xdst->u.rt.idev->dev == dev) {
-                struct in_device *loopback_idev = in_dev_get(init_net.loopback_dev);
+                struct in_device *loopback_idev =
+                        in_dev_get(dev->nd_net->loopback_dev);
                 BUG_ON(!loopback_idev);
 
                 do {
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e2c980dbe52d..452111fa4c52 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -216,9 +216,12 @@ static void ip6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 {
         struct rt6_info *rt = (struct rt6_info *)dst;
         struct inet6_dev *idev = rt->rt6i_idev;
+        struct net_device *loopback_dev =
+                dev->nd_net->loopback_dev;
 
-        if (dev != init_net.loopback_dev && idev != NULL && idev->dev == dev) {
-                struct inet6_dev *loopback_idev = in6_dev_get(init_net.loopback_dev);
+        if (dev != loopback_dev && idev != NULL && idev->dev == dev) {
+                struct inet6_dev *loopback_idev =
+                        in6_dev_get(loopback_dev);
                 if (loopback_idev != NULL) {
                         rt->rt6i_idev = loopback_idev;
                         in6_dev_put(idev);
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index a31dd531e191..4d54951cea08 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -229,7 +229,8 @@ static void xfrm6_dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 
         xdst = (struct xfrm_dst *)dst;
         if (xdst->u.rt6.rt6i_idev->dev == dev) {
-                struct inet6_dev *loopback_idev = in6_dev_get(init_net.loopback_dev);
+                struct inet6_dev *loopback_idev =
+                        in6_dev_get(dev->nd_net->loopback_dev);
                 BUG_ON(!loopback_idev);
 
                 do {
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index a76280a14e72..95dc581861e8 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1934,7 +1934,7 @@ static int stale_bundle(struct dst_entry *dst)
 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
 {
         while ((dst = dst->child) && dst->xfrm && dst->dev == dev) {
-                dst->dev = init_net.loopback_dev;
+                dst->dev = dev->nd_net->loopback_dev;
                 dev_hold(dst->dev);
                 dev_put(dev);
         }